text: 'use strict'
  
  var bnsub = require('big-rat/sub')
  
  module.exports = sub
  
  function sub(a, b) {
    var n = a.length
    var r = new Array(n)
      for(var i=0; i<n; ++i) {
      r[i] = bnsub(a[i], b[i])
    }
    return r
  }
  